page_title: Copiapite
hierarchical_section_title: Copiapite
caption_attribution_description: English: Copiapite Locality: Bolesław Mine, Przygórze, Nowa Ruda, Kłodzko District, Lower Silesia (Dolnośląskie), Poland (Locality at mindat.org) Copiapite [not analysed] is a really weird highly hydrated iron sulfate that forms near the surface, in secondary oxidation zones of iron ore deposits. The iron that forms it usually comes from one or another of the sulfide minerals. It is remarkably light in the hand, and has a chalky texture. This large specimen came from the collection of Dave Stoudt, who was stationed in Poland for 10 years, and had the opportunity to obtain specimens from old and generally closed localities, in addition to some interesting contemporary things many of which did not reach the general market. Sprayed with a very light enamel to prevent crumbling. Deutsch: Copiapit Fundort: Bolesław Mine, Przygórze, Nowa Ruda, Distrikt Kłodzko, Lower Silesia , Polen (Fundort bei mindat.org)
context_page_description: Copiapite is a hydrated iron sulfate mineral with formula: Fe²⁺Fe³⁺₄(SO₄)₆(OH)₂·20. Copiapite can also refer to a mineral group, the copiapite group.
  Copiapite is strictly a secondary mineral forming from the weathering or oxidation of iron sulfide minerals or sulfide-rich coal. Its most common occurrence is as the end member mineral from the rapid oxidation of pyrite. It also occurs rarely with fumaroles. It occurs with melanterite, alunogen, fibroferrite, halotrichite, botryogen, butlerite and amarantite. It is by far the most common mineral in the copiapite group.
  It rarely occurs as single crystals, is in the triclinic crystal system, and is pale to bright yellow. It is soluble in water, changing the water color to deep orange or orangish-red. In solution copiapite is very acidic. In high concentrations a negative pH can occur, as reported in waters draining from Richmond Mine at Iron Mountain, California. Copiapite can easily be distinguished from native sulfur because it does not give off an odor when dissolved in water. It can be distinguished from similar appearing uranium minerals, such as carnotite, by its lack of radioactivity.
context_section_description: Copiapite is a hydrated iron sulfate mineral with formula:  Fe²⁺Fe³⁺₄(SO₄)₆(OH)₂·20(H₂O).  Copiapite can also refer to a mineral group, the copiapite group.
  Copiapite is strictly a secondary mineral forming from the weathering or oxidation of iron sulfide minerals or sulfide-rich coal. Its most common occurrence is as the end member mineral from the rapid oxidation of pyrite.  It also occurs rarely with fumaroles. It occurs with melanterite, alunogen, fibroferrite, halotrichite, botryogen, butlerite and amarantite.  It is by far the most common mineral in the copiapite group.
  It rarely occurs as single crystals, is in the triclinic crystal system, and is pale to bright yellow.  It is soluble in water, changing the water color to deep orange or orangish-red.  In solution copiapite is very acidic. In high concentrations a negative pH can occur, as reported in waters draining from Richmond Mine at Iron Mountain, California.  Copiapite can easily be distinguished from native sulfur because it does not give off an odor when dissolved in water.  It can be distinguished from similar appearing uranium minerals, such as carnotite, by its lack of radioactivity.  The only way to differentiate between the minerals in the copiapite group is by X-ray diffraction.
  Copiapite was first described in 1833 for an occurrence near Copiapó, Atacama, Chile. It is sometimes known as yellow copperas.  Other occurrences are in California, Nevada, and in the filled paleo sinkholes and caves of Missouri.
caption: Copiapite from the Bolesław Mine, Kłodzko District, Lower Silesia, Poland
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